Air cooling and purifying apparatus.



J. B. MITCHELL.

AIR COOLING AND PURIFYING APPARATUS. APPLICATION FILED JuLYls, |914.

Llm. Patented.' Feb. 8, 1916.

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AlR COOLING AND PURIFYING APPARATUS.

APPLICATION FILED IULYS, 19|4. Ll758. Patented Feb. 8, 1916.

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'JOSEPH B. MITCHELL, 0F DETROIT, IMICHIIIGAN'.`

AIB COOLING .AND .PURIFYING APPARATUS.

Specification of Letters Patent.

Patented ren.. s, raie..

Application led .T 111;;1- 13, 1914. Serial No. 850,553.

To all whom t may concern:

Be it known-that I, JOSEPH B. MITcHnLL, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Air.

Cooling and Purifying Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an air cooling and purifying apparatus, and the primary object of my invention is to utilize screens and aqueous curtains or sheets for purifying air and a cooling agent, as ice, for reducing the temperature of the air.

A further object of this invention is to provide an air cooling andpurifying apparatus that can be 4advantageously* used in connection with moving picture' auditoriums, and wherein a continuous circulation of cooled water is used for removing impurities of air that enters an auditorium for Ventilating purposes.

With the above and other objects in View the invention resides in the no vel construct Ition, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the drawings, wherein- Figurefl is a vertical sectional view of an apparatus in accordance with this invention; and Fig. 2 is a horizontal sectional view taken on the line II-II of Fig. 1.

The apparatus to be herein described can be constructed upon alarge scale whereby it can be sed in connection with oliice buildings and large theaters, but as intimated above. it has been especially'designedl for movingpicture auditoriums and small comparatus has been made as compact as partments. With this'end in view, the appossible, simple` in construction and with all parts assembled whereby easy access can be had to such parts of the apparatus as may need cleaning or repair.

The apparatus, housing or box like structure having a front wall 1, a rear wall 2, a bottom wall 3,'a top wall 4 and side walls 5. vAll of these walls have a suitable lining 6 of zinc or a non-corrodible material, and the front wall 1, adjacent the top wall 4, has a doorway 7 normally closed by a door 8. The dooras illustrated, comprises ia stitutes a cha'mber 9 for a cooling agent V10,

Vas ice. rlhe ice is preferably crushed or in lump form and supported by a perforated platform 11 carried by the walls 2 and 5 and extending into proximity to the front wall l. The forward edge of theplatform 11 lhas a perforated ledge 12 which coperates with the side walls 5 in retaining the ice upon the platform. The ledge 12 however, permits of air entering the chamber 9 and passing between the particles of ice.

Air is admitted to the housing at 'an opening 13 in the lower part of the front wall 1, and to force air therein a conventional form of blower 14 is connected to the front wall of the housing. This blower is preferably operated by an electric motor 15 receiving its energy from an electric lighting system or other source of electricity.

. Arranged within the housing are a plurality of superimposed inclined trays 16 and 17 The trays are alternately arranged or in staggered relation with the trays 17 supported by the front walls 1 and the side wall 5, while the trays 16 are supported by the rear wall 2 and side walls 5. The trays 17 extend 'into proximity to the rear wall 2 and the trays 16 into proximity to the front wall 1, thereby providing a sinuous or winding passage for air from the lower part of the housing to the chamber 9 there-v of. The inclined trays are made of a noncorrodible metal and the lower edges thereof are provided with ledges 18 and 'a series of perforations 19, the object of wh1ch will presently appear. y

Air entering the opening 13 encounters one or more screens 20 that are detachably held between the bottom wall 3 and the lbwermost tray 17 by cleats or guides 21 and one of the side walls `5 is slottedr or cut away whereby the screens can be easlly placed in position. The screens are preferablyV made of silk or of very fine gauze of interwoven wire, said screens holding 1n susl pension dust and other foreign matter that through the perforations 19 thereon on to the tray 16 and so on until the bottom of the housing is reached. The drippings of the ice in passing from one inclined tray to another provide aqueous curtains or sheets 22 and it is through thesecurtains or sheets that the air must pass before entering the ,chamber 9 and encountering the ice therein.

To deflect the air against the ice and thus' prevent the air from passing over the ice the chamber.9 is provided with a gravity deflect'or 23. The deflector is pivotally sup# ported contiguous to the front wall 1 and the inner end thereof has a weight 24 that holds the deflector normally upon the ice within the chamber, said deflector shifting by' gravity as the ice melts.

The rear wall 2 of the housing has an exit v or opening 25 in communication with the chamber 9 and' said opening can discharge cooled and purified air direct into a room .or auditorium or the air can be conveyed the ice drippings repeatedly employed or cirlas culated through the apparatus, I provide a tank 28, which is preferably at the bottom of the housing. The tank 28 has the bottom thereof provided with an opening 29 normally closed by a plug 30, said opening permitting of the tank being drained and thoroughly cleansed. Extending into the tank is the'suction pipe 31 of a pump 32,

"said pump being of the ordinary and'well known type generally used for pumping water. The inner end of the suction pipe 31 has a Screen or sieve33 to prevent foreign matter, such as may be held in suspension by the ice, from entering the pump. The pump 32 can be driven from the electric motor 15 or. from any other suitable source of power,

and saidpump has a discharge pipe 34v thereof extending upwardly contiguous to thel opening 7 of the front wall 1. The upper end of the discharge pipe 34 has a header 35 and said header is provided with pipes or branches36 that extend into the housing above the uppermost tray 17. The pipes or .branches 36 have the upper sides thereof perforatedy whereby water can be discharged upwardly against the bottom of the perforated platform 11 to rebound on to` the uppermost tray 17 and thereby provide a double aqueous curtain or sheet. The discharge pipe A34, adjacent the header 35 has a conventional form-of valve 37 which permits of the discharge of water into the housing being regulated to conform to the capacity ofthe pump 32.y The ice drippings can therefore be circulated through the apparatusfand the cold water repeatedly used for purifying the air blown into the housing. l v

It is. thought that the operation and utility-of the apparatus will be apparent without further discussion, and while in the drawing there is illustrated a'preferred einbodiment of my invention, it is to be understood that thestructural elements are susceptible to such changes, as in the size, shape and manner of assemblage, as falls within the scope of the appended claims.

1. An air cooling and purifying apparatus comprising a housing having air. inlet and outlet openings, meansin the-upper part of said housing 'ina horizontalv plane with the air outlet opening of said housing adapted to support an aqueous coolingagent, an inclined tray Within said housing'below said cooling agent adapted to receive drippings from the cooling agent and provide a plurality of aqueous curtains, pipes above said tray adapted to discharge water against the bottom of the cooling agent and coperate with drippings from the cooling agent in providing double aqueous curtains, and means in the upper part of said housing inclined toward said air outlet opening and normally engaging the cooling agent for de- Yfleeting air into contact therewith.

2. A-n aircooling and purifying apparatus comprising a housing having air inlet opening in the bottom thereof and outlet opening 1n the side thereof at the top of said housing, said housing having a Achamber in the upper end thereof adapted to con-A tain an aqueous cooling/agent, said chamber having the bottom thereof perforated, an air deflectorarranged in the chamber of said housing inclined toward said air outlet opening and adapted to normally engage a cooling agent therein, an inclined superimposed tray within. said housing and adapted to receive drippings from the cooling agent and provide a plurality of aqueous curtains,-

pipes above said tray adapted to discharge water agalpst the bottom ofsaid chamberI e peroforations thereof to re.

between t bound and coperate with drippings from said cooling agent in forming double aqueous curtains, and ablower adaptedto force air into said housing and through the aqueous curtains.

3. An air cooling and purifying apparatus comprising a housing havin air inlet and outlet openings, a perforate platform,

in the upper part of said housing and adapted to support a cooling agent, inclined traysv within said housing and providing a sinuous passage, a blower adapted to force air into said housing, perforated pipes within said housing above the uppermost tray and adapted to discharge water against the bottom of said platform and to supply water to said trays andv provide ,aqueous curtains at the ends of said trays and between said plat- 5 form and the uppermost tray, and means for 'conveying water from the bottom of said housing to said perforated pipes.

In testimony whereof I aix my signature in presence of two witnes SGS.

JOSEPH B. MITCHELL. 

